Shaped Abrasive Particles for Personal Care Compositions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional personal care compositions face challenges in achieving effective cleansing and exfoliation while minimizing skin damage, as existing abrasive particles are either too harsh and damaging or too gentle and ineffective.
Innovation Solution
Development of personal care compositions incorporating abrasive particles with specific parameters such as mean Equivalent Circle diameter, circularity, solidity, roughness, packing density, and hardness, combined with a detersive surfactant and dermatologically acceptable carrier, to provide improved cleansing and exfoliation benefits without skin damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional abrasive particles are used to provide cleansing efficacy, then scouring performance is improved, but skin damage risk increases and feel profile deteriorates
Solution Approach 1:
The patent applies parameter changes by precisely controlling multiple particle characteristics including size distribution (10-1000 μm), circularity (0.10-0.50), solidity (0.40-0.90), and surface roughness (0.05-0.30). This multi-parameter optimization transforms conventional abrasive particles into controlled exfoliating particles that maintain cleansing efficacy while reducing skin damage risk through specific geometric and surface property modifications.
Solution Approach 2:
The invention uses composite material principles by combining particles of varying sizes, shapes, and surface properties within a single formulation. The mixture includes different particle types (inorganic materials like carbonate salt, silica, and organic materials like polypropylene, polyethylene) with complementary characteristics, creating a composite abrasive system that balances scouring power with skin gentleness.
2Object-affected harmful factors
If gentle abrasive particles are used to improve feel profile, then skin safety is improved, but cleansing efficacy decreases
Solution Approach 1:
The patent applies segmentation by dividing the abrasive function across multiple particle size classes (10-1000 μm range) with different characteristics. Larger particles provide primary scouring action for effective cleansing, while smaller particles provide gentler exfoliation for skin safety. This segmented approach distributes the cleansing task across particles with different aggressiveness levels, achieving both efficacy and safety.
Solution Approach 2:
The invention implements local quality by ensuring particles have non-uniform surface characteristics with localized rough features distributed across their surfaces. The surface roughness parameter (0.05-0.30) controls the distribution and intensity of abrasive contact points, creating areas of controlled aggression that enhance cleansing without requiring uniformly harsh particles throughout.
3Ease of manufacture
If uniform particle size is used to simplify formulation, then manufacturing ease is improved, but cleansing performance uniformity deteriorates
Solution Approach 1:
The patent applies dynamics by implementing a controlled particle size distribution rather than a fixed uniform size. The formulation specifies a dynamic range (10-1000 μm) with optimized proportions of different size classes, allowing the particle population to adapt to different application conditions and skin types while maintaining consistent overall cleansing performance through the balanced composition.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The compositions effectively clean and exfoliate the skin with reduced risk of damage, offering a balance between efficacy and skin safety through the use of tailored abrasive particles and surfactants.
Implementation Method 1
abrasive particles having two or more parameters selected from a mean Equivalent Circle diameter of between 10 μm to 1000 μm, 50 μm to 500 μm, 75 μm to 350 μm, or 100 μm to 250 μm; a mean Circularity of between 0.10 to 0.50 or between 0.35 to 0.45; a mean Solidity of between 0.40 to 0.90, 0.70 to 0.90, or 0.45 to 0.85; a mean Roughness between 0.05 to 0.30 or between 0.05 to 0.15
Implementation Method 2
The personal care composition further comprises from about 1% to 10%, by weight of the composition, of a detersive surfactant
Data Source
AI summary
A personal care composition is disclosed comprising abrasive particles. The personal care composition may take a variety of forms such as a leave-on composition or an emulsion and/or may comprise one or more actives or agents.